One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(9,10,12,14)(11,15,16,13)(17,18)(19,26)(20,28)(21,31)(22,25)(23,32)(24,27)(29,30)(2,6)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19,22,27)(18,24,25,26)(20,23,30,31)(21,29,32,28)(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,20,23,27,22,30,31,19)(18,24,21,28,25,26,32,29)(1,4,5,3)(2,8,6,7)(10,14)(13,15)(17,21,31,18,22,32,23,25)(19,26,30,28,27,24,20,29)(2,6)(7,8)(10,14)(13,15)(18,25)(21,32)(24,26)(28,29) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.